20.1 Overview

The message store contains the user mailboxes for a particular Messaging
Server instance. The size of the message store increases as the number of
mailboxes, folders, and log files increase. You can control the size of the
store by specifying limits on the size of mailboxes (disk quotas), by specifying
limits on the total number of messages allowed, and by setting aging policies
for messages in the store.

As you add more users to your system, your disk storage requirements
increase. Depending on the number of users your server supports, the message
store might require one physical disk or multiple physical disks. There are
two ways to integrate this additional disk space into your system. The easiest
way is to add additional message store partitions (see 20.10 Configuring Message Store Partitions)

Likewise, if you are supporting multiple hosted domains, you might want
to dedicate a server instance to a single, large domain. With this configuration,
you can designate a store administrator for a particular domain. You can also
expand the message store by adding more partitions.

Creates and synchronizes the backup directory with the information in
the message store.

MoveUser

Moves a user’s account from one messaging server to another.

imquotacheck

Calculates the total mailbox size for each user in the message store
and compares the size with their assigned quota. Localized versions of imquotacheck notification incorrectly convert the % and the $ signs. To correct
the encoding, replace every $ with \24 and replace every % with \25 in the
message file.